Looks like you don't have folders at all, but are instead using some plug-in to Windows Explorer to make the files in Sharepoint look like they are actually files on a network share.
I think there have been other posts on this site about how to extract files from Sharepoint.
Whatever method you use you will probably need to first copy the file out of the Sharepoint server and into a physical xlsx file on the machine where SAS is running before you can use it as data with the XLSX engine.
Looks like you don't have folders at all, but are instead using some plug-in to Windows Explorer to make the files in Sharepoint look like they are actually files on a network share.
I think there have been other posts on this site about how to extract files from Sharepoint.
Whatever method you use you will probably need to first copy the file out of the Sharepoint server and into a physical xlsx file on the machine where SAS is running before you can use it as data with the XLSX engine.
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